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Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Inventory, Net [Abstract]    
Finished goods and work in process $ 431,663 $ 413,020
Logs 35,622 45,574
Other raw materials and supplies 36,195 39,002
Inventories $ 503,480 $ 497,596